Today, I was pulled over by the cops for a random breathalyzer test. They asked to see my license. I always keep my wallet in my car for situations like this. I received a $100 ticket because my mum apparently didn’t think it was a good idea to keep my wallet in the car. FML

Because girl's fashion is stupid, companies often make fake/sowed up pockets in girl's jeans, assuming girls have purses probably. But perhaps OP doesn't have a purse, and without pockets she can't put her wallet anywhere else but in her car. Granted, leaving her wallet in the car was stupid but still.

Not sure how it is where you live , but here in the States you can have the ticket excused if you go to court with your license to prove that you do, indeed, have one.
By the way...although inconvenient to do that to you, your Mum is right that keeping your wallet in the car rather than on your person is not a good idea. Thieves steal stuff out of cars all the time.